Concurrency in C# Cookbook

Concurrency in software engineering is always a difficult theme. But new version of C# which support async/await keywords makes it clear. The book “Concurrency in C#” is a collection of recipes. Just read a half of it and understand that I have a big gap in the modern paralle technoligies, such as:

It's sad but Microsoft RxExtensions seems to be abandoned by Microsoft (no new articles and commits for a several years). Parallel Data Flow is not used widely. As I understand async/await is common way to do almost everything async computations.

I'll not recommend to read this book, except those who can't use latest CLR version.